下面的計算對嗎?把錯的改正過來
(1)4.38×98
=4.38×(100-2)
=4.38×100-2
=438-2
=436
改正:4.38×98
=4.38×(100-2)
=4.38×100-4.38×2
=438-8.76
=429.244.38×98
=4.38×(100-2)
=4.38×100-4.38×2
=438-8.76
=429.24
(2)0.25×8×0.4×1.25
=(0.25×0.4)+(8×1.25)
=0.1+10
=10.1
改正:0.25×8×0.4×1.25
=(0.25×0.4)×(8×1.25)
=0.1×10
=10.25×8×0.4×1.25
=(0.25×0.4)×(8×1.25)
=0.1×10
=1
=4.38×(100-2)
=4.38×100-4.38×2
=438-8.76
=429.24
=4.38×(100-2)
=4.38×100-4.38×2
=438-8.76
=429.24
=(0.25×0.4)×(8×1.25)
=0.1×10
=1
=(0.25×0.4)×(8×1.25)
=0.1×10
=1
【答案】4.38×98
=4.38×(100-2)
=4.38×100-4.38×2
=438-8.76
=429.24;0.25×8×0.4×1.25
=(0.25×0.4)×(8×1.25)
=0.1×10
=1
=4.38×(100-2)
=4.38×100-4.38×2
=438-8.76
=429.24;0.25×8×0.4×1.25
=(0.25×0.4)×(8×1.25)
=0.1×10
=1
【解答】
【點評】
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發(fā)布:2024/6/27 10:35:59組卷:194引用:2難度:0.9